EP3042105B1 - Rotating assembly comprising a transmission member and an oil distribution system - Google Patents

Rotating assembly comprising a transmission member and an oil distribution system Download PDF

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Publication number
EP3042105B1
EP3042105B1 EP14777703.1A EP14777703A EP3042105B1 EP 3042105 B1 EP3042105 B1 EP 3042105B1 EP 14777703 A EP14777703 A EP 14777703A EP 3042105 B1 EP3042105 B1 EP 3042105B1
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EP
European Patent Office
Prior art keywords
oil
distribution system
transmission member
oil distribution
drive
Prior art date
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Active
Application number
EP14777703.1A
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German (de)
French (fr)
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EP3042105A1 (en
Inventor
Michel Gilbert Roland Brault
Kévin LEMARCHAND
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Safran Aircraft Engines SAS
Original Assignee
SNECMA Services SA
SNECMA SAS
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0479—Gears or bearings on planet carriers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0482—Gearings with gears having orbital motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/36—Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/2809—Toothed gearings for conveying rotary motion with gears having orbital motion with means for equalising the distribution of load on the planet-wheels
    • F16H1/2827—Toothed gearings for conveying rotary motion with gears having orbital motion with means for equalising the distribution of load on the planet-wheels by allowing limited movement of the planet carrier, e.g. relative to its shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant

Definitions

  • the present disclosure relates to a rotary assembly comprising a transmission member and an oil distribution system for supplying oil to the transmission member to ensure its lubrication.
  • Such a rotary assembly can in particular be used in the aeronautics field, in turbojets of aircraft or helicopter turboshaft engines, to cite only these examples.
  • turbojet engines conventionally encountered today in the field of civil aviation are twin-turbojet turbofan engines.
  • new turbojet projects with lower specific fuel consumption have been proposed.
  • a promising option is to equip the turbojet engine with a speed reducer interposed between the low-pressure compressor and the blower: in this way, it is possible to increase the speed of rotation of the low-pressure body, thus increasing the overall efficiency. of the turbojet, while reducing the speed of the fan, which reduces the aerodynamic disturbances at the blade tip and thus contributes to reducing the noise generated by the fan.
  • the jet engine turbojet therefore has important qualities but it still poses some difficulties today that will have to be overcome before the launch of its industrialization.
  • this reducer must be lubricated and cooled to ensure proper operation without being damaged.
  • these functions are traditionally provided by a circulation of oil fed by centrifugation; however, it has been found that oil pressure is not sufficient in these reducer turbojet configurations to provide efficient centrifugal feed.
  • Another proposed solution is to transfer the oil between the housing and the gearbox using an oil transfer bearing mounted on the reducer.
  • this solution is also unsatisfactory because the operation of the oil transfer bearing is greatly disturbed by the erratic displacements and misalignments of the gearbox caused by the numerous vibrations to which it is subjected: in particular, premature wear is noted. the oil transfer bearing affecting the oil supply and thus the service life of the gearbox.
  • the present disclosure relates to a rotary assembly comprising a transmission member and an oil distribution system, wherein the oil distribution system comprises at least one oil transfer chamber provided with at least one feed orifice. configured to receive oil from outside the rotating assembly; the transmission member comprises at least one rotating part provided with at least one oil receiving chamber; at least one connecting conduit fluidly connects the oil transfer chamber and the oil receiving chamber; the oil distribution system is integrally rotated by said rotating part of the transmission member; and the rotary assembly is configured to allow a given axial and / or radial relative displacement between said rotating part of the transmission member and the oil distribution system.
  • oil distribution system is rotated integrally in rotation by said rotating part of the transmission member
  • the term “oil distribution system rotates substantially at the same speed, and in any case on average at the same speed, that the rotating part of the transmission member with a phase shift remaining substantially zero, and in any case zero on average, so that a given point of the system of oil distribution always substantially face the same area of the rotating part of the transmission member.
  • This definition therefore tolerates small transient differences in speed or small transient phase shifts due to parasitic vibrations or in case of acceleration or deceleration of the rotating part of the transmission member for example.
  • relative axial and / or radial relative displacement is understood to mean a relative displacement of an amplitude exceeding that resulting from simple usual fixing games: it is a question of offering greater freedom of movement to such games conventional.
  • the orifice of the oil receiving chamber always faces substantially the same orifice of the oil transfer chamber, which allows the establishment of the connecting pipe and therefore the distribution of oil since the oil distribution system to the rotating part of the transmission member.
  • the oil distribution system is configured to be wedged radially in a housing, and the transmission member is mounted floating in this housing, the assembly being configured so that the distribution system oil retains substantially its alignment in the housing regardless of the axial and / or radial displacements of the transmission member.
  • alignment is meant both the direction and the position of its main axis.
  • the oil distribution system is therefore centered on the casing and not on the transmission member: the axial and / or radial of the transmission member being decoupled from the rotational movement of the oil distribution system, the latter can remain aligned in the housing part in which it is wedged. With the exception of its rotational movement, the position and orientation of the interface between the oil distribution system and the casing is thus stable over time, which ensures the reliability of the oil supply and the durability of the oil distribution system.
  • the connecting pipe is mounted floating between, on the one hand, contact surfaces of the oil distribution system and, on the other hand, contact surfaces of the rotating part of the body. of transmission. With this floating assembly, the connecting conduit can follow any small parasitic movements of the rotating part of the transmission member without its possible misalignment disturbs the alignment of the oil distribution system.
  • an O-ring is interposed between the connecting conduit and said contact surfaces of the oil distribution system.
  • an O-ring is interposed between the connecting conduit and said contact surfaces of the rotating part of the transmission member. These O-rings allow to dampen and compensate all the better the relative movements of the rotating part of the transmission member and the oil distribution system. They also provide sealing between the connecting pipe and said contact surfaces.
  • the oil distribution system is connected to the rotating part of the transmission member by means of at least one rotational driving device comprising a damper.
  • This rotary drive device provided with this damper makes it possible to drive the oil distribution system in rotation by limiting the transmission of parasitic movements of the transmission member to the oil distribution system.
  • the oil distribution system is connected to the rotating portion of the transmission member by a plurality of rotation drivers regularly disposed about the axis of the transmission system. oil distribution.
  • the various rotational drive devices can cooperate to also take up small axis variations. parasites of the rotating part of the transmission member without transmitting them to the oil distribution system.
  • the rotating assembly comprises five such rotational drives.
  • the rotation drive device comprises a drive protrusion integral with a wall of one of the two elements constituted by the rotating part of the transmission member and the oil distribution system. said protrusion being engaged in a drive opening of one wall of the other of said elements, and a damper is interposed between said drive protrusion and said drive opening.
  • the drive protrusion is a screw secured in said wall of said member.
  • the driving protrusion is carried by a wall of the rotating part of the transmission member and the driving opening is made in a wall of the oil distribution system.
  • the damper may deform axially and radially.
  • the damper includes an inner ring, in contact with the drive protrusion, an outer ring, mounted in said drive opening, and an axially and radially flexible intermediate body.
  • the damper has axial symmetry.
  • the flexible intermediate body is made of an elastomeric material, in particular nitrile or silicone.
  • the flexible intermediate body is bonded to the inner and outer rings.
  • the inner ring and / or the outer ring are metallic.
  • the outer ring is shrunk into the drive opening.
  • the rotational driving device comprises a drive protrusion integral with a wall of one of the two elements constituted by the rotating part of the transmission member and the oil distribution system, and a spacer provided around the driving protrusion, said spacer being engaged in a drive opening of a wall of the other of said elements; a damper is provided between said driving protrusion and the spacer.
  • the spacer makes it possible to define precise clearances with the drive opening so as to precisely adjust the relative axial and / or radial displacements allowed between the rotating part of the transmission member and the oil distribution system.
  • the damper is an O-ring.
  • the driving protrusion is carried by a wall of the rotating part of the transmission member and the driving opening is made in a drive flange of the oil distribution system.
  • the rotation driving device is configured to allow a given axial displacement of the spacer.
  • the rotational driving device is configured to leave an axial clearance of less than 1 mm, preferably less than 0.5 mm, more preferably approximately 0.2 mm, between the front face of the spacer and the surface of the rotating part.
  • the spacer further includes a flange extending aft of the drive aperture, its diameter being larger than the width of the drive aperture; the rotational driving device is configured to leave an axial clearance of less than 5 mm, preferably less than 2 mm, more preferably approximately 1 mm, between the spacer flange and the rear surface of the drive flange of the oil distribution system.
  • the driver is configured to leave a radial clearance of less than 1 mm, preferably less than 0.6 mm, more preferably about 0.4 mm, between the spacer and driving protrusion.
  • the drive aperture is an oblong aperture whose sides have a straight portion; the spacer comprises flats configured to cooperate with the rectilinear portions of the drive opening, the spacer being movable axially and radially within the drive opening.
  • the driver is configured to leave a side clearance of less than 0.5 mm, preferably less than 0.2 mm, more preferably about 0.12 mm, between the flats. of the spacer and the straight portions of the drive opening.
  • the spacer may move within the drive opening for a length greater than 0.2 mm, preferably about 0.5 mm.
  • the oil transfer chamber is annular and continuous 360 °.
  • the oil transfer chamber of the oil distribution system extends over an angular sector strictly less than 360 °. In this way, the oil transfer chamber is not continuous on the complete revolution of the oil distribution system, which prevents the oil from rotating within the oil transfer chamber and thus limits the flow of oil. impact of oil movements on the overall dynamics of the oil distribution system. In this way, the oil is in the same frame as the distribution system.
  • the transmission member is a speed reducer.
  • the transmission member is an epicyclic gear train.
  • said rotating part of the transmission member is a planet carrier.
  • said planet carrier has a plurality of rockets each carrying a satellite pinion, each rocket being provided with an oil receiving chamber configured to lubricate the bearing of this planet pinion and each receiving chamber of oil being fluidly connected to the oil transfer chamber of the oil distribution system via a connecting pipe.
  • the present disclosure further relates to a turbomachine comprising a rotary assembly according to any one of the preceding embodiments, the oil distribution system of this assembly being housed in a housing provided with an oil supply chamber.
  • the housing includes an annular oil outlet annulus open 360 ° to the oil delivery system and fluidly connected to the feed chamber.
  • the oil distribution system comprises an annular oil inlet cavity open 360 ° opposite the oil outlet cavity of the housing and fluidly connected to the oil transfer chamber by the intermediate of said at least one feed port.
  • the oil inlet cavity of the oil distribution system is flanked on both sides by a sealing segment.
  • the oil leaks at the interface between the oil distribution system and the housing maintain an oil film.
  • the sealing segments are sized so that the pressure of the oil allows the oil to pass the sealing segments so as to initiate the oil film.
  • This oil film is used to lubricate the interface between the oil distribution system and the housing to allow it to rotate properly.
  • the casing surrounding the distribution system and the transmission member forms a closed chamber for recovering the oil and to prevent it from polluting or being polluted by other elements of the turbomachine.
  • FIG 1 represents, in section along a vertical plane passing through its main axis A, a turbojet engine 1 with a double-flow gearbox according to the invention. It comprises, from upstream to downstream, a fan 2, a reducer 3, a low-pressure compressor 4, a high-pressure compressor 5, a combustion chamber 6, a high-pressure turbine 7 and a low-pressure turbine 8.
  • the high-pressure turbine 7 drives the high-pressure compressor 5 by means of a high-pressure shaft 9.
  • the low-pressure turbine 8 also called a fast turbine, drives the low-pressure compressor. 4, also called a fast compressor, using a low pressure shaft 10.
  • the high speed turbine 8 also drives the blower 2 via the speed reducer 3. In this way, the blower 2 can be driven at a speed reduced, which is favorable from the aerodynamic point of view, while the low pressure compressor 4 can be driven at higher speed, which is favorable from a thermodynamic point of view.
  • This reducer 3 is partially visible on the FIG 2 it is an epicyclic gear provided with a ring 31, a sun gear 32, and planet pinions 33.
  • the planet gears 33 are rotatably mounted on rockets 34 of a planet carrier 35.
  • the bearings 36 between the planet gears 33 and their respective fuses 34 may be smooth, as in this example, or may comprise a rolling mechanism, for example with rollers.
  • the planet carrier 35 drives the fan 2 while the sun gear is driven by the low pressure shaft 10.
  • the gearbox 3 is mounted floating in a housing 40: due in particular to the vibrations experienced by the gearbox 3, the latter can move within the housing 40 by a few millimeters axially or radially around its nominal position. Because of these parasitic movements, the axis of the gearbox 3 can also deviate a few degrees from its nominal alignment axis in the housing 40.
  • the bearings 36 In order to limit the friction of the planet gears 33 on their rockets 34, the bearings 36 must be lubricated: an oil lubrication is therefore provided. This circulation of oil furthermore makes it possible to cool the bearings 36.
  • the rockets 34 of the planet gears 33 each comprise an oil receiving chamber 37 fluidly connected to the bearing 36 by channels (not shown) passing through the rocket 34.
  • the casing 40 comprises an oil supply chamber 41. The oil transfer between the oil supply chamber 41 of the casing 40 and the different oil receiving chambers 37 of the rockets 34 of the planet carrier 35 is provided by means of an oil distribution system 50.
  • This oil distribution system 50 is a generally annular shaped piece provided with a cylindrical outer wall 51 and comprising an oil transfer chamber 52 extending in a circular arc inside and along almost all of the outer wall 51
  • the epicyclic gear train comprises five planet gears 33: it is therefore advantageous for the oil transfer chamber to extend over a little more than 4/5 of a revolution in order to power the rockets 34 of the gate. -satellites 35.
  • the oil distribution system 50 is mounted in the housing 40 by engaging its cylindrical outer wall 51 in a cylindrical collar 42 of the housing 40.
  • the housing 40 comprises, on the back of the hoop 42, an annular oil outlet cavity 43 extending to 360 ° along the hoop 42 and fluidly connected to the oil supply chamber 41 via an orifice 44.
  • the oil distribution system 50 comprises an annular oil inlet cavity 53 open at 360 ° in the cylindrical outer wall 51 and fluidly connected to the oil transfer chamber 52 via supply ports 54.
  • annular exit and oil inlet cavities 43, 53 are arranged in such a way that they face each other when the oil distribution system 50 is mounted in the casing 40, the hoop 42 being provided with orifices. passage 45 at the oil outlet cavity 43.
  • the hoop 42 is provided with at least a dozen orifices 45.
  • the oil distribution system 50 further comprises two seals sealing rings 55 arranged in annular grooves 56 formed in the cylindrical outer wall 51 on either side of the annular oil inlet recess 53.
  • the seals 55 are dimensioned such that a low oil leakage rate remains possible so as to maintain a film of oil at the interface between the oil distribution system and the casing 40.
  • the casing surrounding the distribution system and the transmission member forms a closed enclosure to recover the hu and prevent it from polluting or being polluted by other elements of the turbomachine.
  • the front wall 57 of the oil distribution system 50 includes recesses 58 provided at rocket-facing locations 34 of planet carrier 35: in this example, the oil distribution system 50 thus comprises five recesses 58 regularly spaced. These recesses 58 each communicate fluidly with the oil transfer chamber 52 by means of orifices 59.
  • Each rocket 34 of the planet carrier 35 comprises a recess 38 communicating fluidly with the oil receiving chamber 37.
  • a connecting pipe 70 is mounted floating, on the one hand, between the lateral walls of the recess 38 of the rocket 34 and, on the other hand, between the lateral walls of the recess 58 of the system.
  • oil distribution 50 located vis-à-vis, thus enabling the oil receiving chamber 37 of said rocket 34 to be connected filuidally to the oil distribution chamber 52.
  • the connecting pipe 70 further comprises front 71 and rear o-rings 72 sealing between the connecting conduit 70 and the side walls of the recesses 38 and 58, respectively.
  • the O-rings also provide some damping and create annular linear connections to absorb radial and angular dispersions between the oil distribution system and the oil receiving chamber.
  • the oil leaves the oil supply chamber 41 of the housing 40 to fill the annular outlet cavity 43 through the orifice 44; the oil then flows throughout the annular outlet cavity 43 and passes through the passages 45 of the hoop to fill in turn the inlet cavity 53 of the oil distribution system 50 and enter the oil transfer chamber 52 through the intake ports 54; the oil can then be distributed via the connecting ducts 70 to the oil receiving chambers 37 of the rockets 34 from which it will be conveyed to the bearings 36.
  • the rotary assembly composed of the gearbox 3 and its The oil dispensing system 50 further comprises a rotary drive 80.
  • the rotary assembly includes as many rotational drive units 80 as rockets 34. each rotational driving device 80 being located near a connecting conduit 70.
  • the oil delivery system 50 includes drive flanges 60 extending radially outwardly from the front wall 57 of the oil delivery system 50 at the recesses 58.
  • Each drive flange 60 is pierced by a circular drive opening 61 in which the rotational drive device 80 engages.
  • the rotary drive devices 80 are located near the connecting ducts 70 and on the same diameters as the latter.
  • each rotating drive device is located between two satellites. They may also be provided closer to the center of the oil distribution system to reduce system bulk.
  • the rotational driving device 80 comprises a damper 81 comprising a metal outer ring 82, a metal inner ring 83 and a flexible silicone intermediate body 84 bonded between the outer and inner rings 82 and 83.
  • the damper 81 is hooped within of the drive opening 61 through its outer ring 82.
  • the inner ring 83 has on its face on its front flange 85 extending radially.
  • a driving screw 86 is engaged within the inner ring 83 and fixed in the planet carrier 35 so as to press the radial flange 85 of the inner ring 83 against the surface of the planet carrier 35.
  • FIG 5, 6A and 6B illustrate a second example of an oil distribution system 150 quite similar to that of the first example but equipped with a different rotational driving device 180.
  • the oil distribution system 150 also includes drive flanges 160, each drive flange 160 being pierced with a drive opening 161; however, in this example, the drive opening 161 is not circular but oblong, its lateral sides each having a rectilinear portion 162.
  • the driver 180 includes a spacer 187 having side flats 188, configured to cooperate with the straight portions 162 of the drive port 161, and a rear radial flange 189 configured to cooperate with the rear surface of the flange. 160 training.
  • the spacer 187 further comprises a central bore 190 in which engages a drive screw 186 fixed in the planet carrier 135.
  • An O-ring 191, acting as a damper, is furthermore disposed between the screw of drive 186 and the bore 190 of the spacer 187.
  • This rotational driving device 180 is configured to leave certain gaps between these different parts. So, as shown on the FIG 6B when the radial flange 189 of the spacer 187 is pressed against the shoulder 186a of the drive screw 186 and the drive flange 160 is pressed against the planet carrier 135, a first clearance J1 of about 0 2 mm is left between the front face of the spacer 187 and the surface of the planet carrier 135; in addition, a second clearance J2 of about 1 mm is left between the radial flange 189 of the spacer 187 and the rear surface of the drive flange 160.
  • a third clearance J3 of about 0.4 mm is left between the drive screw 186 and the central bore 190 of the spacer 187: this third set J3 is filled by the O-ring 191.
  • a fourth set J4 d approximately 0.12 mm is left between the flats 188 of the spacer 187 and the rectilinear portions 162 of the drive opening 161.
  • the spacer 187 is free to move radially along the opening. oblong drive 161 over a length J5 of about 0.5 mm depending on the operating dispersions of the reducer.
  • the rotation of the planet carrier 135 causes rotation of the oil distribution system 150.
  • the axial or radial displacements of the gearbox 3 are not transmitted to the oil distribution system 150.
  • the misalignments of the reducer 3 are also not transmitted to the oil distribution system 150.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Details Of Gearings (AREA)

Description

DOMAINE DE L'INVENTIONFIELD OF THE INVENTION

Le présent exposé concerne un ensemble rotatif comprenant un organe de transmission et un système de distribution d'huile permettant de fournir de l'huile à l'organe de transmission afin d'assurer sa lubrification.The present disclosure relates to a rotary assembly comprising a transmission member and an oil distribution system for supplying oil to the transmission member to ensure its lubrication.

Un tel ensemble rotatif peut notamment être utilisé dans le domaine aéronautique, au sein de turboréacteurs d'avions ou de turbomoteurs d'hélicoptères pour ne citer que ces exemples.Such a rotary assembly can in particular be used in the aeronautics field, in turbojets of aircraft or helicopter turboshaft engines, to cite only these examples.

ETAT DE LA TECHNIQUE ANTERIEURESTATE OF THE PRIOR ART

Les turboréacteurs classiquement rencontrés aujourd'hui dans le domaine de l'aviation civile sont des turboréacteurs double corps à double flux. Toutefois, en raison des contraintes toujours plus importantes sur les coûts d'exploitation, étroitement liés au coût des carburants, aujourd'hui très élevé, de nouveaux projets de turboréacteurs bénéficiant d'une plus faible consommation spécifique ont été proposés.The turbojet engines conventionally encountered today in the field of civil aviation are twin-turbojet turbofan engines. However, due to the ever-increasing constraints on operating costs, which are closely linked to the cost of fuel, which is currently very high, new turbojet projects with lower specific fuel consumption have been proposed.

Une option prometteuse consiste à équiper le turboréacteur d'un réducteur de vitesse intercalé entre le compresseur basse-pression et la soufflante : de cette manière, il est possible d'augmenter la vitesse de rotation du corps basse-pression, augmentant ainsi le rendement global du turboréacteur, tout en réduisant la vitesse de la soufflante, ce qui réduit les perturbations aérodynamiques en bout de pale et contribue ainsi à réduire le bruit généré par la soufflante.A promising option is to equip the turbojet engine with a speed reducer interposed between the low-pressure compressor and the blower: in this way, it is possible to increase the speed of rotation of the low-pressure body, thus increasing the overall efficiency. of the turbojet, while reducing the speed of the fan, which reduces the aerodynamic disturbances at the blade tip and thus contributes to reducing the noise generated by the fan.

Le turboréacteur à réducteur présente donc d'importantes qualités mais il pose encore aujourd'hui quelques difficultés qui devront être surmontée avant le lancement de son industrialisation.The jet engine turbojet therefore has important qualities but it still poses some difficulties today that will have to be overcome before the launch of its industrialization.

En particulier, ce réducteur doit être lubrifié et refroidi pour assurer son fonctionnement correct sans être endommagé. Dans un réducteur classique, ces fonctions sont traditionnellement assurées par une circulation d'huile alimentée par centrifugation ; toutefois, il a été constaté que la pression d'huile n'était pas suffisante dans ces configurations de turboréacteur à réducteur pour assurer une alimentation par centrifugation efficace.In particular, this reducer must be lubricated and cooled to ensure proper operation without being damaged. In a conventional reducer, these functions are traditionally provided by a circulation of oil fed by centrifugation; however, it has been found that oil pressure is not sufficient in these reducer turbojet configurations to provide efficient centrifugal feed.

Une autre solution proposée consiste à transférer l'huile entre le carter et le réducteur à l'aide d'un palier de transfert d'huile monté sur le réducteur. Toutefois, cette solution n'est pas non plus satisfaisante car le fonctionnement du palier de transfert d'huile est fortement perturbé par les déplacements et les désaxements erratiques du réducteur causés par les nombreuses vibrations auquel il est soumis : on constate en particulier des usures prématurées du palier de transfert d'huile affectant l'alimentation en huile et donc la durée de vie du réducteur.Another proposed solution is to transfer the oil between the housing and the gearbox using an oil transfer bearing mounted on the reducer. However, this solution is also unsatisfactory because the operation of the oil transfer bearing is greatly disturbed by the erratic displacements and misalignments of the gearbox caused by the numerous vibrations to which it is subjected: in particular, premature wear is noted. the oil transfer bearing affecting the oil supply and thus the service life of the gearbox.

On connait également les documents US 6 223 616 et US 2013/0225353 qui décrivent d'autres système de distribution d'huile pour des organes de transmission.We also know the documents US 6,223,616 and US 2013/0225353 which describe other oil distribution systems for transmission members.

Il existe donc un réel besoin pour un ensemble rotatif comprenant un organe de transmission et un système de distribution d'huile qui soit dépourvu, au moins en partie, des inconvénients inhérents aux configurations connues précitées.There is therefore a real need for a rotary assembly comprising a transmission member and an oil distribution system which is devoid, at least in part, of the disadvantages inherent in the aforementioned known configurations.

PRESENTATION DE L'INVENTIONPRESENTATION OF THE INVENTION

Le présent exposé concerne un ensemble rotatif comprenant un organe de transmission et un système de distribution d'huile, dans lequel le système de distribution d'huile comprend au moins une chambre de transfert d'huile munie d'au moins un orifice d'alimentation configuré pour recevoir de l'huile depuis l'extérieur de l'ensemble rotatif ; l'organe de transmission comprend au moins une partie tournante munie d'au moins une chambre de réception d'huile ; au moins un conduit de liaison connecte fluidiquement la chambre de transfert d'huile et la chambre de réception d'huile ; le système de distribution d'huile est entrainé solidairement en rotation par ladite partie tournante de l'organe de transmission ; et l'ensemble rotatif est configuré de manière à permettre un déplacement relatif axial et/ou radial donné entre ladite partie tournante de l'organe de transmission et le système de distribution d'huile.The present disclosure relates to a rotary assembly comprising a transmission member and an oil distribution system, wherein the oil distribution system comprises at least one oil transfer chamber provided with at least one feed orifice. configured to receive oil from outside the rotating assembly; the transmission member comprises at least one rotating part provided with at least one oil receiving chamber; at least one connecting conduit fluidly connects the oil transfer chamber and the oil receiving chamber; the oil distribution system is integrally rotated by said rotating part of the transmission member; and the rotary assembly is configured to allow a given axial and / or radial relative displacement between said rotating part of the transmission member and the oil distribution system.

Dans le présent exposé, on entend par « le système de distribution d'huile est entrainé solidairement en rotation par ladite partie tournante de l'organe de transmission» le fait que le système de distribution d'huile tourne sensiblement à la même vitesse, et en tout état de cause en moyenne à la même vitesse, que la partie tournante de l'organe de transmission avec un déphasage restant sensiblement nul, et en tout état de cause nul en moyenne, de telle sorte qu'un point donné du système de distribution d'huile fasse toujours sensiblement face à la même zone de la partie tournante de l'organe de transmission. Cette définition tolère donc de petites différences de vitesse transitoires ou de petits déphasages transitoires dues à des vibrations parasites ou en cas d'accélération ou de décélération de la partie tournante de l'organe de transmission par exemple.In the present description, the term "oil distribution system is rotated integrally in rotation by said rotating part of the transmission member" the fact that the oil distribution system rotates substantially at the same speed, and in any case on average at the same speed, that the rotating part of the transmission member with a phase shift remaining substantially zero, and in any case zero on average, so that a given point of the system of oil distribution always substantially face the same area of the rotating part of the transmission member. This definition therefore tolerates small transient differences in speed or small transient phase shifts due to parasitic vibrations or in case of acceleration or deceleration of the rotating part of the transmission member for example.

En outre, on entend par « déplacement relatif axial et/ou radial donné » un déplacement relatif d'une amplitude dépassant celle résultant de simples jeux habituels de fixation : il s'agit bien d'offrir une liberté de mouvement supérieure à de tels jeux conventionnels.In addition, the expression "relative axial and / or radial relative displacement" is understood to mean a relative displacement of an amplitude exceeding that resulting from simple usual fixing games: it is a question of offering greater freedom of movement to such games conventional.

Dès lors, l'orifice de la chambre de réception d'huile fait toujours sensiblement face à un même orifice de la chambre de transfert d'huile, ce qui permet la mise en place du conduit de liaison et donc la distribution d'huile depuis le système de distribution d'huile vers la partie tournante de l'organe de transmission.Therefore, the orifice of the oil receiving chamber always faces substantially the same orifice of the oil transfer chamber, which allows the establishment of the connecting pipe and therefore the distribution of oil since the oil distribution system to the rotating part of the transmission member.

D'autre part, grâce à cette configuration, à l'exclusion de l'entraînement en rotation, les mouvements de l'organe de transmission et du système de distribution d'huile, au moins dans une plage d'amplitude donnée, sont découplés : la partie tournante de l'organe de transmission peut ainsi subir certains déplacements ou désaxements erratiques causés par les vibrations de l'organe de transmission, leur propagation au système de distribution d'huile étant réduite voire totalement évitée. La position et l'alignement de ce dernier vis-à-vis de l'extérieur de l'ensemble rotatif n'est donc pas ou peu perturbée durant sa rotation, ce qui assure une alimentation correcte du système de distribution d'huile depuis l'extérieur et une réduction des fuites d'huile à cette interface.On the other hand, thanks to this configuration, with the exception of the rotational drive, the movements of the transmission member and the oil distribution system, at least within a given range of amplitude, are decoupled. the rotating part of the transmission member can thus undergo some erratic displacements or offsets caused by the vibrations of the transmission member, their propagation to the oil distribution system being reduced or completely avoided. The position and the alignment of the latter vis-à-vis the outside of the rotating assembly is therefore not or little disturbed during its rotation, which ensures a correct supply of the oil distribution system since the outside and a reduction of oil leaks at this interface.

En particulier, on limite ainsi le risque que le système de distribution d'huile, suivant les mouvements erratiques de l'organe de transmission, n'entre en collision avec certains organes extérieurs à l'ensemble rotatif, un carter par exemple, ou ne frottent sur ces derniers : dès lors, l'efficacité de l'ensemble rotatif est préservée et son usure est réduite, ce qui augmente sa durée de vie.In particular, this limits the risk that the oil distribution system, following the erratic movements of the transmission member, collides with certain external members to the rotating assembly, a housing for example, or not they are rubbed on these: consequently, the efficiency of the rotary assembly is preserved and its wear is reduced, which increases its service life.

Dans le présent exposé, les termes « axial », « radial », « tangentiel », « intérieur », « extérieur » et leurs dérivés sont définis par rapport à l'axe principal de l'ensemble rotatif.In the present description, the terms "axial", "radial", "tangential", "interior", "exterior" and their derivatives are defined with respect to the main axis of the rotary assembly.

Dans certains modes de réalisation, le système de distribution d'huile est configuré pour être calé radialement dans un carter, et l'organe de transmission est monté flottant dans ce carter, l'ensemble étant configuré de manière à ce que le système de distribution d'huile conserve sensiblement son alignement dans le carter quels que soient les déplacements axiaux et/ou radiaux de l'organe de transmission. Par « alignement », on entend à la fois la direction et la position de son axe principal. Le système de distribution d'huile est donc centré sur le carter et non sur l'organe de transmission : les mouvements parasites axiaux et/ou radiaux de l'organe de transmission étant découplés du mouvement de rotation du système de distribution d'huile, ce dernier peut rester aligné dans la partie de carter dans laquelle il est calé. A l'exception de son mouvement de rotation, la position et l'orientation de l'interface entre le système de distribution d'huile et le carter est ainsi stable dans le temps, ce qui assure la fiabilité de l'alimentation en huile et la durabilité du système de distribution d'huile.In some embodiments, the oil distribution system is configured to be wedged radially in a housing, and the transmission member is mounted floating in this housing, the assembly being configured so that the distribution system oil retains substantially its alignment in the housing regardless of the axial and / or radial displacements of the transmission member. By "alignment" is meant both the direction and the position of its main axis. The oil distribution system is therefore centered on the casing and not on the transmission member: the axial and / or radial of the transmission member being decoupled from the rotational movement of the oil distribution system, the latter can remain aligned in the housing part in which it is wedged. With the exception of its rotational movement, the position and orientation of the interface between the oil distribution system and the casing is thus stable over time, which ensures the reliability of the oil supply and the durability of the oil distribution system.

Dans certains modes de réalisation, le conduit de liaison est monté flottant entre, d'une part, des surfaces de contact du système de distribution d'huile et, d'autre part, des surfaces de contact de la partie tournante de l'organe de transmission. Grâce à ce montage flottant, le conduit de liaison peut suivre les éventuels petits mouvements parasites de la partie tournante de l'organe de transmission sans que son désalignement éventuel ne perturbe l'alignement du système de distribution d'huile.In some embodiments, the connecting pipe is mounted floating between, on the one hand, contact surfaces of the oil distribution system and, on the other hand, contact surfaces of the rotating part of the body. of transmission. With this floating assembly, the connecting conduit can follow any small parasitic movements of the rotating part of the transmission member without its possible misalignment disturbs the alignment of the oil distribution system.

Dans certains modes de réalisation, un joint torique s'interpose entre le conduit de liaison et lesdites surfaces de contact du système de distribution d'huile.In some embodiments, an O-ring is interposed between the connecting conduit and said contact surfaces of the oil distribution system.

Dans certains modes de réalisation, un joint torique s'interpose entre le conduit de liaison et lesdites surfaces de contact de la partie tournante de l'organe de transmission. Ces joints toriques permettent d'amortir et de compenser d'autant mieux les déplacements relatifs de la partie tournante de l'organe de transmission et du système de distribution d'huile. Ils permettent également d'assure l'étanchéité entre le conduit de liaison et lesdites surfaces de contact.In some embodiments, an O-ring is interposed between the connecting conduit and said contact surfaces of the rotating part of the transmission member. These O-rings allow to dampen and compensate all the better the relative movements of the rotating part of the transmission member and the oil distribution system. They also provide sealing between the connecting pipe and said contact surfaces.

Dans certains modes de réalisation, le système de distribution d'huile est connecté à la partie tournante de l'organe de transmission à l'aide d'au moins un dispositif d'entraînement en rotation comprenant un amortisseur. Ce dispositif d'entraînement en rotation muni de cet amortisseur permet d'entraîner le système de distribution d'huile en rotation en limitant la transmission des mouvements parasites de l'organe de transmission au système de distribution d'huile.In some embodiments, the oil distribution system is connected to the rotating part of the transmission member by means of at least one rotational driving device comprising a damper. This rotary drive device provided with this damper makes it possible to drive the oil distribution system in rotation by limiting the transmission of parasitic movements of the transmission member to the oil distribution system.

Dans certains modes de réalisation, le système de distribution d'huile est connecté à la partie tournante de l'organe de transmission à l'aide d'une pluralité de dispositifs d'entraînement en rotation régulièrement disposés autour de l'axe du système de distribution d'huile. De cette manière, les différents dispositifs d'entraînement en rotation peuvent coopérer pour reprendre également les petites variations d'axe parasites de la partie tournante de l'organe de transmission sans les transmettre au système de distribution d'huile. De préférence, l'ensemble rotatif comprend cinq dispositifs d'entraînement en rotation de ce type.In some embodiments, the oil distribution system is connected to the rotating portion of the transmission member by a plurality of rotation drivers regularly disposed about the axis of the transmission system. oil distribution. In this way, the various rotational drive devices can cooperate to also take up small axis variations. parasites of the rotating part of the transmission member without transmitting them to the oil distribution system. Preferably, the rotating assembly comprises five such rotational drives.

Dans certains modes de réalisation, le dispositif d'entraînement en rotation comprend une protrusion d'entraînement solidaire d'une paroi de l'un des deux éléments constitués par la partie tournante de l'organe de transmission et le système de distribution d'huile, ladite protrusion étant engagée dans une ouverture d'entraînement d'une paroi de l'autre desdits éléments, et un amortisseur est interposé entre ladite protrusion d'entraînement et ladite ouverture d'entraînement.In some embodiments, the rotation drive device comprises a drive protrusion integral with a wall of one of the two elements constituted by the rotating part of the transmission member and the oil distribution system. said protrusion being engaged in a drive opening of one wall of the other of said elements, and a damper is interposed between said drive protrusion and said drive opening.

Dans certains modes de réalisation, la protrusion d'entraînement est une vis fixée dans ladite paroi dudit élément.In some embodiments, the drive protrusion is a screw secured in said wall of said member.

Dans certains modes de réalisation, la protrusion d'entraînement est portée par une paroi de la partie tournante de l'organe de transmission et l'ouverture d'entraînement est pratiquée dans une paroi du système de distribution d'huile.In some embodiments, the driving protrusion is carried by a wall of the rotating part of the transmission member and the driving opening is made in a wall of the oil distribution system.

Dans certains modes de réalisation, l'amortisseur peut se déformer axialement et radialement.In some embodiments, the damper may deform axially and radially.

Dans certains modes de réalisation, l'amortisseur comprend une bague intérieure, en contact avec la protrusion d'entraînement, une bague extérieure, montée dans ladite ouverture d'entraînement, et un corps intermédiaire souple axialement et radialement. Cette configuration offre ainsi un rattrapage des mouvements parasites de la partie tournante de l'organe de transmission dans toutes les directions. Il s'agit en outre d'un système statique, les déplacements relatifs étant compensés par l'élasticité de l'amortisseur.In some embodiments, the damper includes an inner ring, in contact with the drive protrusion, an outer ring, mounted in said drive opening, and an axially and radially flexible intermediate body. This configuration thus offers a catch-up of parasitic movements of the rotating part of the transmission member in all directions. It is also a static system, the relative movements being compensated by the elasticity of the damper.

Dans certains modes de réalisation, l'amortisseur possède une symétrie axiale.In some embodiments, the damper has axial symmetry.

Dans certains modes de réalisation, le corps intermédiaire souple est en un matériau élastomère, notamment en nitrile ou en silicone.In some embodiments, the flexible intermediate body is made of an elastomeric material, in particular nitrile or silicone.

Dans certains modes de réalisation, le corps intermédiaire souple est collé sur les bagues intérieure et extérieure.In some embodiments, the flexible intermediate body is bonded to the inner and outer rings.

Dans certains modes de réalisation, la bague intérieure et/ou la bague extérieure sont métalliques.In some embodiments, the inner ring and / or the outer ring are metallic.

Dans certains modes de réalisation, la bague extérieure est frettée dans l'ouverture d'entraînement.In some embodiments, the outer ring is shrunk into the drive opening.

Dans d'autres modes de réalisation, le dispositif d'entraînement en rotation comprend une protrusion d'entraînement solidaire d'une paroi de l'un des deux éléments constitués par la partie tournante de l'organe de transmission et le système de distribution d'huile, et une entretoise prévue autour de la protrusion d'entraînement, ladite entretoise étant engagée dans une ouverture d'entraînement d'une paroi de l'autre desdits éléments ; un amortisseur est prévu entre ladite protrusion d'entraînement et l'entretoise. L'entretoise permet de définir des jeux précis avec l'ouverture d'entraînement de manière à régler précisément les déplacements relatifs axial et/ou radial autorisés entre la partie tournante de l'organe de transmission et le système de distribution d'huile.In other embodiments, the rotational driving device comprises a drive protrusion integral with a wall of one of the two elements constituted by the rotating part of the transmission member and the oil distribution system, and a spacer provided around the driving protrusion, said spacer being engaged in a drive opening of a wall of the other of said elements; a damper is provided between said driving protrusion and the spacer. The spacer makes it possible to define precise clearances with the drive opening so as to precisely adjust the relative axial and / or radial displacements allowed between the rotating part of the transmission member and the oil distribution system.

Dans certains modes de réalisation, l'amortisseur est un joint torique.In some embodiments, the damper is an O-ring.

Dans certains modes de réalisation, la protrusion d'entraînement est portée par une paroi de la partie tournante de l'organe de transmission et l'ouverture d'entraînement est pratiquée dans une bride d'entraînement du système de distribution d'huile.In some embodiments, the driving protrusion is carried by a wall of the rotating part of the transmission member and the driving opening is made in a drive flange of the oil distribution system.

Dans certains modes de réalisation, le dispositif d'entraînement en rotation est configuré pour permettre un déplacement axial donné de l'entretoise.In some embodiments, the rotation driving device is configured to allow a given axial displacement of the spacer.

Dans certains modes de réalisation, le dispositif d'entraînement en rotation est configuré de manière à laisser un jeu axial inférieur à 1mm, de préférence inférieur à 0,5 mm, de préférence encore environ égal à 0,2 mm, entre la face avant de l'entretoise et la surface de la partie tournante.In certain embodiments, the rotational driving device is configured to leave an axial clearance of less than 1 mm, preferably less than 0.5 mm, more preferably approximately 0.2 mm, between the front face of the spacer and the surface of the rotating part.

Dans certains modes de réalisation, l'entretoise comprend en outre une collerette s'étendant à l'arrière de l'ouverture d'entraînement, son diamètre étant supérieur à la largeur de l'ouverture d'entraînement ; le dispositif d'entraînement en rotation est configuré de manière à laisser un jeu axial inférieur à 5 mm, de préférence inférieur à 2 mm, de préférence encore environ égal à 1 mm, entre la collerette de l'entretoise et la surface arrière de la bride d'entraînement du système de distribution en huile.In some embodiments, the spacer further includes a flange extending aft of the drive aperture, its diameter being larger than the width of the drive aperture; the rotational driving device is configured to leave an axial clearance of less than 5 mm, preferably less than 2 mm, more preferably approximately 1 mm, between the spacer flange and the rear surface of the drive flange of the oil distribution system.

Dans certains modes de réalisation, le dispositif d'entraînement est configuré de manière à laisser un jeu radial inférieur à 1 mm, de préférence inférieur à 0,6 mm, de préférence encore environ égal à 0,4 mm, entre l'entretoise et la protrusion d'entraînement.In some embodiments, the driver is configured to leave a radial clearance of less than 1 mm, preferably less than 0.6 mm, more preferably about 0.4 mm, between the spacer and driving protrusion.

Dans certains modes de réalisation, l'ouverture d'entraînement est une ouverture oblongue dont les côtés comportent une portion rectiligne ; l'entretoise comprend des méplats configurés pour coopérer avec les portions rectilignes de l'ouverture d'entraînement, l'entretoise pouvant se déplacer axialement et radialement au sein de l'ouverture d'entraînement.In some embodiments, the drive aperture is an oblong aperture whose sides have a straight portion; the spacer comprises flats configured to cooperate with the rectilinear portions of the drive opening, the spacer being movable axially and radially within the drive opening.

Dans certains modes de réalisation, le dispositif d'entraînement est configuré de manière à laisser un jeu latéral inférieur à 0,5 mm, de préférence inférieur à 0,2 mm, de préférence encore environ égal à 0,12 mm, entre les méplats de l'entretoise et les portions rectilignes de l'ouverture d'entraînement.In some embodiments, the driver is configured to leave a side clearance of less than 0.5 mm, preferably less than 0.2 mm, more preferably about 0.12 mm, between the flats. of the spacer and the straight portions of the drive opening.

Dans certains modes de réalisation, l'entretoise peut se déplacer au sein de l'ouverture d'entraînement sur une longueur supérieure à 0,2 mm, de préférence environ égale à 0,5 mm.In some embodiments, the spacer may move within the drive opening for a length greater than 0.2 mm, preferably about 0.5 mm.

Dans certains modes de réalisation, la chambre de transfert d'huile est annulaire et continue sur 360°.In some embodiments, the oil transfer chamber is annular and continuous 360 °.

Dans d'autres modes de réalisation, la chambre de transfert d'huile du système de distribution d'huile s'étend sur un secteur angulaire strictement inférieur à 360°. De cette manière, la chambre de transfert d'huile n'est pas continue sur le tour complet du système de distribution d'huile, ce qui empêche l'huile de tourner au sein de la chambre de transfert d'huile et limite ainsi l'impact des mouvements de l'huile sur la dynamique d'ensemble du système de distribution d'huile. De cette manière, l'huile se situe dans le même repère que le système de distribution.In other embodiments, the oil transfer chamber of the oil distribution system extends over an angular sector strictly less than 360 °. In this way, the oil transfer chamber is not continuous on the complete revolution of the oil distribution system, which prevents the oil from rotating within the oil transfer chamber and thus limits the flow of oil. impact of oil movements on the overall dynamics of the oil distribution system. In this way, the oil is in the same frame as the distribution system.

Dans certains modes de réalisation, l'organe de transmission est un réducteur de vitesse.In some embodiments, the transmission member is a speed reducer.

Dans certains modes de réalisation, l'organe de transmission est un train épicycloïdal.In some embodiments, the transmission member is an epicyclic gear train.

Dans certains modes de réalisation, ladite partie tournante de l'organe de transmission est un porte-satellites.In some embodiments, said rotating part of the transmission member is a planet carrier.

Dans certains modes de réalisation, ledit porte-satellites possède une pluralité de fusées portant chacune un pignon satellite, chaque fusée étant munie d'une chambre de réception d'huile configurée pour lubrifier le palier de ce pignon satellite et chaque chambre de réception d'huile étant connecté fluidiquement à la chambre de transfert d'huile du système de distribution d'huile par un conduit de liaison.In some embodiments, said planet carrier has a plurality of rockets each carrying a satellite pinion, each rocket being provided with an oil receiving chamber configured to lubricate the bearing of this planet pinion and each receiving chamber of oil being fluidly connected to the oil transfer chamber of the oil distribution system via a connecting pipe.

Le présent exposé concerne en outre une turbomachine comprenant un ensemble rotatif selon l'un quelconque des modes de réalisation précédents, le système de distribution d'huile de cet ensemble étant logé dans un carter muni d'une chambre d'alimentation en huile.The present disclosure further relates to a turbomachine comprising a rotary assembly according to any one of the preceding embodiments, the oil distribution system of this assembly being housed in a housing provided with an oil supply chamber.

Dans certains modes de réalisation, le carter comprend une cavité annulaire de sortie d'huile ouverte à 360° en direction du système de distribution d'huile et connectée fluidiquement à la chambre d'alimentation en huile ; le système de distribution d'huile comprend une cavité annulaire d'entrée d'huile ouverte à 360° en vis-à-vis de la cavité de sortie d'huile du carter et connectée fluidiquement à la chambre de transfert d'huile par l'intermédiaire dudit au moins un orifice d'alimentation. Grâce à cet ensemble rotatif dont le système de distribution d'huile reste aligné au sein du carter malgré les mouvements parasites de l'organe de transmission, les cavités annulaires de sortie et d'entrée d'huile restent alignées en vis-à-vis dans le même plan malgré la rotation du système de distribution d'huile et les mouvements parasite de l'organe de transmission : l'alimentation en huile du système de distribution d'huile tournant depuis le carter fixe peut ainsi être réalisée de manière fiable. Les fuites d'huile à cette interface sont en outre limitées.In some embodiments, the housing includes an annular oil outlet annulus open 360 ° to the oil delivery system and fluidly connected to the feed chamber. in oil; the oil distribution system comprises an annular oil inlet cavity open 360 ° opposite the oil outlet cavity of the housing and fluidly connected to the oil transfer chamber by the intermediate of said at least one feed port. Thanks to this rotary assembly whose oil distribution system remains aligned within the housing despite the parasitic movements of the transmission member, the annular cavities of output and oil inlet remain aligned vis-à-vis in the same plane despite the rotation of the oil distribution system and parasitic movements of the transmission member: the oil supply of the oil distribution system rotating from the fixed housing can thus be reliably performed. Oil leaks at this interface are also limited.

Dans certains modes de réalisation, la cavité d'entrée d'huile du système de distribution d'huile est encadrée de part et d'autre par un segment d'étanchéité.In some embodiments, the oil inlet cavity of the oil distribution system is flanked on both sides by a sealing segment.

Dans certains modes de réalisation, les fuites d'huile à l'interface entre le système de distribution d'huile et le carter maintiennent un film d'huile. Les segments d'étanchéité sont en effet dimensionnés de telle sorte que la pression de l'huile permet à l'huile de dépasser les segments d'étanchéité de manière à initier le film d'huile. Ce film d'huile permet de lubrifier l'interface entre le système de distribution d'huile et le carter afin de permettre sa bonne rotation. De préférence, le carter entourant le système de distribution et l'organe de transmission forme une enceinte fermée permettant de récupérer l'huile et d'éviter qu'elle ne pollue ou qu'elle soit polluée par d'autres éléments de la turbomachine.In some embodiments, the oil leaks at the interface between the oil distribution system and the housing maintain an oil film. The sealing segments are sized so that the pressure of the oil allows the oil to pass the sealing segments so as to initiate the oil film. This oil film is used to lubricate the interface between the oil distribution system and the housing to allow it to rotate properly. Preferably, the casing surrounding the distribution system and the transmission member forms a closed chamber for recovering the oil and to prevent it from polluting or being polluted by other elements of the turbomachine.

Les caractéristiques et avantages précités, ainsi que d'autres, apparaîtront à la lecture de la description détaillée d'exemples de réalisation de l'ensemble rotatif proposé. Cette description détaillée fait référence aux dessins annexés.The above-mentioned features and advantages, as well as others, will become apparent on reading the detailed description of exemplary embodiments of the proposed rotary assembly. This detailed description refers to the accompanying drawings.

BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

Les dessins annexés sont schématiques et visent avant tout à illustrer les principes de l'invention.The accompanying drawings are schematic and are intended primarily to illustrate the principles of the invention.

Sur ces dessins, d'une figure (FIG) à l'autre, des éléments (ou parties d'élément) identiques sont repérés par les mêmes signes de référence. En outre, des éléments (ou parties d'éléments) appartenant à des exemples de réalisation différents mais ayant une fonction analogue sont repérés sur les figures par des références numériques incrémentées de 100, 200, etc.

  • La FIG 1 est une vue en coupe axiale d'un exemple de turbomachine à réducteur.
  • La FIG 2 est une vue partielle en coupe d'un premier exemple de système de distribution d'huile et de son environnement.
  • Les FIG 3A et 3B sont des vues en perspective, de face et de dos, du premier exemple de système de distribution d'huile.
  • La FIG 4 est une vue en perspective et en coupe d'une partie du premier exemple de système de distribution d'huile.
  • La FIG 5 est une vue en perspective d'une partie d'un deuxième exemple de système de distribution d'huile.
  • La FIG 6A est une vue de face du dispositif d'entraînement en rotation du système distribution d'huile de la FIG 5.
  • La FIG 6B est une vue en coupe du dispositif d'entraînement en rotation du système de distribution d'huile de la FIG 5.
In these drawings, from one figure (FIG) to the other, identical elements (or element parts) are identified by the same reference signs. In addition, elements (or parts of elements) belonging to different embodiments but having a similar function are shown in the figures by incremented numerals of 100, 200, etc.
  • The FIG 1 is an axial sectional view of an example of a turbomachine gearbox.
  • The FIG 2 is a partial sectional view of a first example of an oil distribution system and its environment.
  • The FIG 3A and 3B are perspective views, front and back, of the first example of an oil distribution system.
  • The FIG 4 is a perspective view in section of a portion of the first example of an oil distribution system.
  • The FIG 5 is a perspective view of a portion of a second example of an oil distribution system.
  • The FIG 6A is a front view of the rotary drive device of the oil distribution system of the FIG 5 .
  • The FIG 6B is a sectional view of the rotary drive device of the oil distribution system of the FIG 5 .

DESCRIPTION DETAILLEE D'EXEMPLES DE REALISATIONDETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Afin de rendre plus concrète l'invention, des exemples d'ensembles rotatifs sont décrits en détail ci-après, en référence aux dessins annexés. Il est rappelé que l'invention ne se limite pas à ces exemples.In order to make the invention more concrete, examples of rotating assemblies are described in detail hereinafter with reference to the accompanying drawings. It is recalled that the invention is not limited to these examples.

La FIG 1 représente, en coupe selon un plan vertical passant par son axe principal A, un turboréacteur 1 à double flux à réducteur selon l'invention. Il comporte, d'amont en aval, une soufflante 2, un réducteur 3, un compresseur basse pression 4, un compresseur haute pression 5, une chambre de combustion 6, une turbine haute pression 7 et une turbine basse pression 8.The FIG 1 represents, in section along a vertical plane passing through its main axis A, a turbojet engine 1 with a double-flow gearbox according to the invention. It comprises, from upstream to downstream, a fan 2, a reducer 3, a low-pressure compressor 4, a high-pressure compressor 5, a combustion chamber 6, a high-pressure turbine 7 and a low-pressure turbine 8.

Dans un tel turboréacteur à réducteur 1, la turbine haute pression 7 entraîne le compresseur haute pression 5 à l'aide d'un arbre haute pression 9. La turbine basse pression 8, également appelée turbine rapide, entraîne quant à elle le compresseur basse pression 4, également appelé compresseur rapide, à l'aide d'un arbre basse pression 10. La turbine rapide 8 entraîne également la soufflante 2 par l'intermédiaire du réducteur de vitesse 3. De cette manière, la soufflante 2 peut être entraînée à vitesse réduite, ce qui est favorable du point de vue aérodynamique, tandis que le compresseur basse pression 4 peut être entraîné à vitesse plus importante, ce qui est favorable d'un point de vue thermodynamique.In such a turbojet engine 1, the high-pressure turbine 7 drives the high-pressure compressor 5 by means of a high-pressure shaft 9. The low-pressure turbine 8, also called a fast turbine, drives the low-pressure compressor. 4, also called a fast compressor, using a low pressure shaft 10. The high speed turbine 8 also drives the blower 2 via the speed reducer 3. In this way, the blower 2 can be driven at a speed reduced, which is favorable from the aerodynamic point of view, while the low pressure compressor 4 can be driven at higher speed, which is favorable from a thermodynamic point of view.

Ce réducteur 3 est visible partiellement sur la FIG 2 : il s'agit d'un train épicycloïdal muni d'une couronne 31, d'un pignon solaire 32, et de pignons satellites 33. Les pignons satellites 33 sont montés en rotation sur des fusées 34 d'un porte-satellite 35. Les paliers 36 entre les pignons satellites 33 et leurs fusées respectives 34 peuvent être lisses, comme dans cet exemple, ou peuvent comprendre un mécanisme de roulement, par exemple à rouleaux. Dans cet exemple, le porte-satellite 35 entraine la soufflante 2 tandis que le pignon solaire est entrainé par l'arbre basse pression 10.This reducer 3 is partially visible on the FIG 2 it is an epicyclic gear provided with a ring 31, a sun gear 32, and planet pinions 33. The planet gears 33 are rotatably mounted on rockets 34 of a planet carrier 35. The bearings 36 between the planet gears 33 and their respective fuses 34 may be smooth, as in this example, or may comprise a rolling mechanism, for example with rollers. In this example, the planet carrier 35 drives the fan 2 while the sun gear is driven by the low pressure shaft 10.

Le réducteur 3 est monté flottant dans un carter 40 : en raison notamment des vibrations subies par le réducteur 3, ce dernier peut se déplacer au sein du carter 40 de quelques millimètres axialement ou radialement autour de sa position nominale. En raison de ces mouvements parasites, l'axe du réducteur 3 peut également dévier de quelques degrés par rapport à son axe d'alignement nominal dans le carter 40.The gearbox 3 is mounted floating in a housing 40: due in particular to the vibrations experienced by the gearbox 3, the latter can move within the housing 40 by a few millimeters axially or radially around its nominal position. Because of these parasitic movements, the axis of the gearbox 3 can also deviate a few degrees from its nominal alignment axis in the housing 40.

Afin de limiter les frottements des pignons satellites 33 sur leurs fusées 34, les paliers 36 doivent être lubrifiés : une lubrification par huile est donc prévue. Cette circulation d'huile permet en outre de refroidir les paliers 36. Pour permettre cette lubrification, les fusées 34 des pignons satellites 33 comportent chacune une chambre de réception d'huile 37 connectée fluidiquement au palier 36 par des canaux (non représenté) traversant la fusée 34. Le carter 40 comprend quant à lui une chambre d'alimentation en huile 41. Le transfert d'huile entre la chambre d'alimentation en huile 41 du carter 40 et les différentes chambres de réception d'huile 37 des fusées 34 du porte-satellites 35 est assurée à l'aide d'un système de distribution d'huile 50.In order to limit the friction of the planet gears 33 on their rockets 34, the bearings 36 must be lubricated: an oil lubrication is therefore provided. This circulation of oil furthermore makes it possible to cool the bearings 36. To enable this lubrication, the rockets 34 of the planet gears 33 each comprise an oil receiving chamber 37 fluidly connected to the bearing 36 by channels (not shown) passing through the rocket 34. The casing 40 comprises an oil supply chamber 41. The oil transfer between the oil supply chamber 41 of the casing 40 and the different oil receiving chambers 37 of the rockets 34 of the planet carrier 35 is provided by means of an oil distribution system 50.

Ce système de distribution d'huile 50, mieux visible sur les FIG 3A, 3B et 4, est une pièce de forme générale annulaire munie d'une paroi extérieure cylindrique 51 et comprenant une chambre de transfert d'huile 52 s'étendant en arc de cercle à l'intérieur et le long de la quasi-totalité de la paroi extérieure 51. Dans cet exemple de réalisation, le train épicycloïdal comprend cinq pignons satellites 33 : il est donc avantageux que la chambre de transfert d'huile s'étende sur un peu plus de 4/5 de tour pour pouvoir alimenter les 5 fusées 34 du porte-satellites 35.This oil distribution system 50, better visible on the FIG 3A, 3B and 4 , is a generally annular shaped piece provided with a cylindrical outer wall 51 and comprising an oil transfer chamber 52 extending in a circular arc inside and along almost all of the outer wall 51 In this exemplary embodiment, the epicyclic gear train comprises five planet gears 33: it is therefore advantageous for the oil transfer chamber to extend over a little more than 4/5 of a revolution in order to power the rockets 34 of the gate. -satellites 35.

Le système de distribution d'huile 50 est monté dans le carter 40 en engageant sa paroi extérieure cylindrique 51 dans une frette cylindrique 42 du carter 40.The oil distribution system 50 is mounted in the housing 40 by engaging its cylindrical outer wall 51 in a cylindrical collar 42 of the housing 40.

Afin de transférer l'huile depuis la chambre d'alimentation en huile 41 vers la chambre de transfert d'huile 52, le carter 40 comprend, au dos de la frette 42, une cavité annulaire de sortie d'huile 43 s'étendant à 360° le long de la frette 42 et connecté fluidiquement à la chambre d'alimentation en huile 41 par l'intermédiaire d'un orifice 44.In order to transfer the oil from the oil supply chamber 41 to the oil transfer chamber 52, the housing 40 comprises, on the back of the hoop 42, an annular oil outlet cavity 43 extending to 360 ° along the hoop 42 and fluidly connected to the oil supply chamber 41 via an orifice 44.

Le système de distribution d'huile 50 comprend quant à lui une cavité annulaire d'entrée d'huile 53 ouverte à 360° dans la paroi extérieure cylindrique 51 et connectée fluidiquement à la chambre de transfert d'huile 52 par l'intermédiaire d'orifices d'alimentation 54.The oil distribution system 50 comprises an annular oil inlet cavity 53 open at 360 ° in the cylindrical outer wall 51 and fluidly connected to the oil transfer chamber 52 via supply ports 54.

Ces cavités annulaire de sortie et d'entrée d'huile 43, 53 sont disposés de telle sorte qu'elles se font face lorsque le système de distribution d'huile 50 est monté dans le carter 40, la frette 42 étant munie d'orifices de passage 45 au niveau de la cavité de sortie d'huile 43. Dans cet exemple, la frette 42 est munie d'au moins une dizaine d'orifices de passage 45. Le système de distribution d'huile 50 comprend en outre deux joints d'étanchéité annulaires 55 disposés dans des rainures annulaires 56 pratiquées dans la paroi extérieure cylindrique 51 de part et d'autre de la cavité annulaire d'entrée d'huile 53. Les joints d'étanchéité 55 sont dimensionnés de telle sorte qu'un faible débit de fuite d'huile reste possible de manière à maintenir un film d'huile à l'interface entre le système de distribution d'huile et le carter 40. Le carter entourant le système de distribution et l'organe de transmission forme une enceinte fermée permettant de récupérer l'huile et d'éviter qu'elle ne pollue ou qu'elle soit polluée par d'autres éléments de la turbomachine.These annular exit and oil inlet cavities 43, 53 are arranged in such a way that they face each other when the oil distribution system 50 is mounted in the casing 40, the hoop 42 being provided with orifices. passage 45 at the oil outlet cavity 43. In this example, the hoop 42 is provided with at least a dozen orifices 45. The oil distribution system 50 further comprises two seals sealing rings 55 arranged in annular grooves 56 formed in the cylindrical outer wall 51 on either side of the annular oil inlet recess 53. The seals 55 are dimensioned such that a low oil leakage rate remains possible so as to maintain a film of oil at the interface between the oil distribution system and the casing 40. The casing surrounding the distribution system and the transmission member forms a closed enclosure to recover the hu and prevent it from polluting or being polluted by other elements of the turbomachine.

Afin de transférer l'huile depuis la chambre de transfert 52 vers les chambres de réception d'huile 37 des fusées 34, la paroi avant 57 du système de distribution d'huile 50 comprend des renfoncements 58 prévus à des emplacements faisant face aux fusées 34 du porte-satellites 35 : dans cet exemple, le système de distribution d'huile 50 comprend donc cinq renfoncements 58 régulièrement espacés. Ces renfoncements 58 communiquent chacun fluidiquement avec la chambre de transfert d'huile 52 à l'aide d'orifices 59.In order to transfer the oil from the transfer chamber 52 to the oil receiving chambers 37 of the rockets 34, the front wall 57 of the oil distribution system 50 includes recesses 58 provided at rocket-facing locations 34 of planet carrier 35: in this example, the oil distribution system 50 thus comprises five recesses 58 regularly spaced. These recesses 58 each communicate fluidly with the oil transfer chamber 52 by means of orifices 59.

Chaque fusée 34 du porte-satellites 35 comprend quant à elle un renfoncement 38 communiquant fluidiquement avec la chambre de réception d'huile 37.Each rocket 34 of the planet carrier 35 comprises a recess 38 communicating fluidly with the oil receiving chamber 37.

Pour chaque fusée 34, un conduit de liaison 70 est monté flottant, d'une part, entre les parois latérales du renfoncement 38 de la fusée 34 et, d'autre part, entre les parois latérales du renfoncement 58 du système de distribution d'huile 50 situé en vis-à-vis, permettant ainsi de connecter filuidiquement la chambre de réception d'huile 37 de cette fusée 34 à la chambre de distribution d'huile 52. Le conduit de liaison 70 comprend en outre des joints toriques avant 71 et arrière 72 assurant l'étanchéité entre le conduit de liaison 70 et les parois latérales des renfoncements 38 et 58, respectivement. Les joints toriques assurent également un certain amortissement et créent des liaisons linéaires annulaires afin d'absorber les dispersions radiales et angulaires entre le système de distribution d'huile et la chambre de réception d'huile.For each rocket 34, a connecting pipe 70 is mounted floating, on the one hand, between the lateral walls of the recess 38 of the rocket 34 and, on the other hand, between the lateral walls of the recess 58 of the system. oil distribution 50 located vis-à-vis, thus enabling the oil receiving chamber 37 of said rocket 34 to be connected filuidally to the oil distribution chamber 52. The connecting pipe 70 further comprises front 71 and rear o-rings 72 sealing between the connecting conduit 70 and the side walls of the recesses 38 and 58, respectively. The O-rings also provide some damping and create annular linear connections to absorb radial and angular dispersions between the oil distribution system and the oil receiving chamber.

Ainsi, lors de l'alimentation en huile, l'huile quitte la chambre d'alimentation en huile 41 du carter 40 pour remplir la cavité annulaire de sortie 43 à travers l'orifice 44 ; l'huile se déverse alors dans l'ensemble de la cavité annulaire de sortie 43 et passe à travers les passages 45 de la frette pour remplir à son tour la cavité d'entrée 53 du système de distribution d'huile 50 puis entrer dans la chambre de transfert d'huile 52 par les orifices d'admission 54 ; l'huile peut alors être distribuée par l'intermédiaire des conduits de liaison 70 aux chambres de réception d'huile 37 des fusées 34 à partir desquelles elle sera acheminée jusqu'aux paliers 36.Thus, during the supply of oil, the oil leaves the oil supply chamber 41 of the housing 40 to fill the annular outlet cavity 43 through the orifice 44; the oil then flows throughout the annular outlet cavity 43 and passes through the passages 45 of the hoop to fill in turn the inlet cavity 53 of the oil distribution system 50 and enter the oil transfer chamber 52 through the intake ports 54; the oil can then be distributed via the connecting ducts 70 to the oil receiving chambers 37 of the rockets 34 from which it will be conveyed to the bearings 36.

Afin de permettre l'entraînement en rotation du système de distribution d'huile 50 solidairement avec le porte-satellites 35 du réducteur 3 tout en limitant les contraintes exercées sur les conduits de liaison 70, l'ensemble rotatif composé du réducteur 3 et de son système de distribution d'huile 50 comprend en outre un dispositif d'entraînement en rotation 80. De préférence, comme c'est le cas dans cet exemple, l'ensemble rotatif comprend autant de dispositifs d'entraînement en rotation 80 que de fusées 34, chaque dispositif d'entraînement en rotation 80 étant localisé à proximité d'un conduit de liaison 70.In order to enable the rotation of the oil distribution system 50 in solidarity with the planet carrier 35 of the gearbox 3 while limiting the stresses exerted on the connecting conduits 70, the rotary assembly composed of the gearbox 3 and its The oil dispensing system 50 further comprises a rotary drive 80. Preferably, as is the case in this example, the rotary assembly includes as many rotational drive units 80 as rockets 34. each rotational driving device 80 being located near a connecting conduit 70.

Plus précisément, le système de distribution d'huile 50 comprend des brides d'entraînement 60 s'étendant radialement vers l'extérieur depuis la paroi avant 57 du système de distribution d'huile 50 au niveau des renfoncements 58. Chaque bride d'entraînement 60 est percée d'une ouverture d'entraînement 61 circulaire dans lequel s'engage le dispositif d'entraînement en rotation 80.Specifically, the oil delivery system 50 includes drive flanges 60 extending radially outwardly from the front wall 57 of the oil delivery system 50 at the recesses 58. Each drive flange 60 is pierced by a circular drive opening 61 in which the rotational drive device 80 engages.

Dans cet exemple, les dispositifs d'entraînement en rotation 80 sont situés à proximité des conduits de liaison 70 et sur les mêmes diamètres que ces derniers. Toutefois, en fonction de la forme du système de distribution d'huile, d'autres configurations sont possible. En particulier, il pourrait également être intéressant que chaque dispositif d'entraînement en rotation soit localisé entre deux satellites. Ils peuvent également être prévus plus proches du centre du système de distribution d'huile pour réduire l'encombrement du système.In this example, the rotary drive devices 80 are located near the connecting ducts 70 and on the same diameters as the latter. However, depending on the shape of the oil distribution system, other configurations are possible. In particular, he could also be interesting that each rotating drive device is located between two satellites. They may also be provided closer to the center of the oil distribution system to reduce system bulk.

Le dispositif d'entraînement en rotation 80 comprend un amortisseur 81 comportant une bague extérieure métallique 82, une bague intérieure métallique 83 et un corps intermédiaire souple en silicone 84 collé entre les bagues extérieure 82 et intérieure 83. L'amortisseur 81 est fretté au sein de l'ouverture d'entraînement 61 par l'intermédiaire de sa bague extérieure 82. La bague intérieure 83 comporte quant à elle sur sa face avant une collerette 85 s'étendant radialement. Une vis d'entraînement 86 est engagée au sein de la bague intérieure 83 et fixée dans le porte-satellites 35 de manière à plaquer la collerette radiale 85 de la bague intérieure 83 contre la surface du porte-satellites 35.The rotational driving device 80 comprises a damper 81 comprising a metal outer ring 82, a metal inner ring 83 and a flexible silicone intermediate body 84 bonded between the outer and inner rings 82 and 83. The damper 81 is hooped within of the drive opening 61 through its outer ring 82. The inner ring 83 has on its face on its front flange 85 extending radially. A driving screw 86 is engaged within the inner ring 83 and fixed in the planet carrier 35 so as to press the radial flange 85 of the inner ring 83 against the surface of the planet carrier 35.

Grâce à ce dispositif d'entraînement en rotation 80, la rotation du porte-satellites 35 entraîne la rotation du système de distribution d'huile 50. Toutefois, les déplacements axiaux ou radiaux du réducteur 3 sont amortis par le corps intermédiaire souple 84 de l'amortisseur 81 et ne sont donc pas transmis au système de distribution d'huile 50 : à l'exception de son mouvement de rotation, la position du système de distribution d'huile 50 par rapport au carter 40 n'est donc pas modifiée. En outre, grâce à la pluralité de dispositifs d'entraînement en rotation 80 répartis autour du système de distribution d'huile 50, les désaxements du réducteur 3 ne sont pas non plus transmis au système de distribution d'huile 50.With this rotational driving device 80, the rotation of the planet carrier 35 causes the rotation of the oil distribution system 50. However, the axial or radial displacements of the reducer 3 are damped by the flexible intermediate body 84 of the damper 81 and are therefore not transmitted to the oil distribution system 50: with the exception of its rotational movement, the position of the oil distribution system 50 relative to the housing 40 is not changed. In addition, thanks to the plurality of rotary drive devices 80 distributed around the oil distribution system 50, the misalignments of the gearbox 3 are also not transmitted to the oil distribution system 50.

Les FIG 5, 6A et 6B illustrent un deuxième exemple de système de distribution d'huile 150 tout à fait analogue à celui du premier exemple mais équipé d'un dispositif d'entraînement en rotation 180 différent.The FIG 5, 6A and 6B illustrate a second example of an oil distribution system 150 quite similar to that of the first example but equipped with a different rotational driving device 180.

Dans cet exemple, le système de distribution d'huile 150 comprend également des brides entraînement 160, chaque bride d'entraînement 160 étant percée d'une ouverture d'entraînement 161 ; toutefois, dans cet exemple, l'ouverture d'entraînement 161 n'est pas circulaire mais oblongue, ses côtés latéraux comportant chacun une portion rectiligne 162.In this example, the oil distribution system 150 also includes drive flanges 160, each drive flange 160 being pierced with a drive opening 161; however, in this example, the drive opening 161 is not circular but oblong, its lateral sides each having a rectilinear portion 162.

Le dispositif d'entraînement 180 comprend une entretoise 187 possédant des méplats latéraux 188, configurés pour coopérer avec les portions rectilignes 162 de l'orifice d'entraînement 161, et une collerette radiale arrière 189 configurée pour coopérer avec la surface arrière de la bride d'entraînement 160.The driver 180 includes a spacer 187 having side flats 188, configured to cooperate with the straight portions 162 of the drive port 161, and a rear radial flange 189 configured to cooperate with the rear surface of the flange. 160 training.

L'entretoise 187 comprend en outre un alésage central 190 dans lequel s'engage une vis d'entraînement 186 fixée dans le porte-satellites 135. Un joint torique 191, faisant office d'amortisseur, est en outre disposé entre la vis d'entraînement 186 et l'alésage 190 de l'entretoise 187.The spacer 187 further comprises a central bore 190 in which engages a drive screw 186 fixed in the planet carrier 135. An O-ring 191, acting as a damper, is furthermore disposed between the screw of drive 186 and the bore 190 of the spacer 187.

Ce dispositif d'entraînement en rotation 180 est configuré de manière à laisser certains jeux entre ces différentes pièces. Ainsi, comme cela est représenté sur la FIG 6B, lorsque la collerette radiale 189 de l'entretoise 187 est plaquée contre l'épaulement 186a de la vis d'entraînement 186 et que la bride d'entraînement 160 est plaquée contre le porte-satellites 135, un premier jeu J1 d'environ 0,2 mm est laissé entre la face avant de l'entretoise 187 et la surface du porte-satellites 135 ; de plus, un deuxième jeu J2 d'environ 1 mm est laissé entre la collerette radiale 189 de l'entretoise 187 et la surface arrière de la bride entraînement 160.This rotational driving device 180 is configured to leave certain gaps between these different parts. So, as shown on the FIG 6B when the radial flange 189 of the spacer 187 is pressed against the shoulder 186a of the drive screw 186 and the drive flange 160 is pressed against the planet carrier 135, a first clearance J1 of about 0 2 mm is left between the front face of the spacer 187 and the surface of the planet carrier 135; in addition, a second clearance J2 of about 1 mm is left between the radial flange 189 of the spacer 187 and the rear surface of the drive flange 160.

Comme cela est représenté sur la FIG 6A, un troisième jeu J3 d'environ 0,4 mm est laissé entre la vis d'entraînement 186 et l'alésage central 190 de l'entretoise 187 : ce troisième jeu J3 est comblé par le joint torique 191. Un quatrième jeu J4 d'environ 0,12 mm est laissé entre les méplats 188 de l'entretoise 187 et les portions rectilignes 162 de l'ouverture d'entraînement 161. Enfin, l'entretoise 187 est libre de se déplacer radialement le long de l'ouverture d'entraînement oblongue 161 sur une longueur J5 d'environ 0,5 mm en fonction des dispersions de fonctionnement du réducteur.As shown on the FIG 6A a third clearance J3 of about 0.4 mm is left between the drive screw 186 and the central bore 190 of the spacer 187: this third set J3 is filled by the O-ring 191. A fourth set J4 d approximately 0.12 mm is left between the flats 188 of the spacer 187 and the rectilinear portions 162 of the drive opening 161. Finally, the spacer 187 is free to move radially along the opening. oblong drive 161 over a length J5 of about 0.5 mm depending on the operating dispersions of the reducer.

Ainsi, grâce à ce dispositif d'entraînement en rotation 180, la rotation du porte-satellites 135 entraîne la rotation du système de distribution d'huile 150. Toutefois, grâce à ces jeux J1 à J5 ainsi qu'à l'amortisseur 191, les déplacements axiaux ou radiaux du réducteur 3 ne sont pas transmis au système de distribution d'huile 150. En outre, grâce à la pluralité de dispositifs d'entraînement en rotation 180 répartis autour du système de distribution d'huile 150, les désaxements du réducteur 3 ne sont pas non plus transmis au système de distribution d'huile 150.Thus, thanks to this rotational driving device 180, the rotation of the planet carrier 135 causes rotation of the oil distribution system 150. However, thanks to these games J1 to J5 as well as to the damper 191, the axial or radial displacements of the gearbox 3 are not transmitted to the oil distribution system 150. In addition, thanks to the plurality of rotational drive devices 180 distributed around the oil distribution system 150, the misalignments of the reducer 3 are also not transmitted to the oil distribution system 150.

Les modes ou exemples de réalisation décrits dans le présent exposé sont donnés à titre illustratif et non limitatif, une personne du métier pouvant facilement, au vu de cet exposé, modifier ces modes ou exemples de réalisation, ou en envisager d'autres, tout en restant dans la portée de l'invention.The modes or examples of embodiment described in the present description are given for illustrative and not limiting, a person skilled in the art can easily, in view of this presentation, modify these modes or embodiments, or consider others, while remaining within the scope of the invention.

De plus, les différentes caractéristiques de ces modes ou exemples de réalisation peuvent être utilisées seules ou être combinées entre elles. Lorsqu'elles sont combinées, ces caractéristiques peuvent l'être comme décrit ci-dessus ou différemment, l'invention ne se limitant pas aux combinaisons spécifiques décrites dans le présent exposé. En particulier, sauf précision contraire, une caractéristique décrite en relation avec un mode ou exemple de réalisation peut être appliquée de manière analogue à un autre mode ou exemple de réalisation.In addition, the various features of these modes or embodiments can be used alone or be combined with each other. When combined, these features may be as described above or differently, the invention not being limited to the specific combinations described herein. In particular, unless otherwise specified, a characteristic described in connection with a mode or example of embodiment may be applied in a similar manner to another embodiment or embodiment.

Claims (12)

  1. A rotary assembly comprising a transmission member (3) and an oil distribution system (50), wherein:
    the oil distribution system (50) comprises at least one oil transfer chamber (52) provided with at least one feed orifice (54) configured to receive oil from outside the rotary assembly;
    the transmission member (3) includes at least one rotary portion (35) provided with at least one oil reception chamber (37);
    at least one link duct (70) provides fluid flow connection between the oil transfer chamber (52) and the oil reception chamber (37);
    wherein the oil distribution system (50) is driven to rotate together with said rotary portion (35) of the transmission member (3); and
    wherein the rotary assembly is configured in such a manner as to accommodate a given amount of axial and/or radial relative movement between said rotary portion (35) of the transmission member (3) and the oil distribution system (50).
  2. An assembly according to claim 1, wherein the oil distribution system (50) is configured to be held radially in a casing (40), and wherein the transmission member (3) is floatingly mounted in the casing (40), the assembly being configured in such a manner that the oil distribution system (50) substantially conserves its alignment in the casing (40) regardless of the axial and/or radial movements of the transmission member (3).
  3. An assembly according to claim 1 or claim 2, wherein the link duct (70) is floatingly mounted between firstly contact surfaces (58) of the oil distribution system (50), and secondly contact surfaces (38) of the rotary portion (35) of the transmission member (3), O-rings (71, 72) being preferably interposed between the link duct (70) and said contact surfaces (58, 38) of the oil distribution system (50) and the rotary portion (35) of the transmission member (3).
  4. An assembly according to any one of claims 1 to 3, wherein the oil distribution system (50) is connected to the rotary portion (35) of the transmission member (3) via at least one rotary drive device (80) including a damper (81).
  5. An assembly according to claim 4, wherein the rotary drive device (80) comprises a drive protrusion (86) secured to the wall of one of the two elements (35) constituted by the rotary portion of the transmission member and the oil distribution system, said protrusion (86) being engaged in a drive opening (61) in a wall (60) of the other one of said elements (50), and
    wherein a damper (81) is interposed between said drive protrusion (86) and said drive opening (61).
  6. An assembly according to claim 5, wherein the damper (81) comprises a metal inner ring (83) in contact with the drive protrusion (86), a metal outer ring (82) mounted in said drive opening (61), and an axially and radially flexible intermediate body (84).
  7. An assembly according to claim 4, wherein the rotary drive device (180) comprises a drive protrusion (186) secured to a wall of one of the two elements (35) constituted by the rotary portion of the transmission member and the oil distribution system, and a spacer (187) provided around the drive protrusion (186), said spacer (187) being engaged in a drive opening (161) in a wall (160) of the other one of said elements (150), and
    wherein a damper (191) is provided between said drive protrusion (186) and the spacer (187), the damper (191) preferably being an 0-ring.
  8. An assembly according to claim 7, wherein the drive opening (161) is an oblong opening having sides including a rectilinear portion (162), and wherein the spacer (187) has flats (188) configured to co-operate with the rectilinear portions (162) of the drive opening (161), the spacer (187) being capable of moving axially and radially within the drive opening (161).
  9. An assembly according to any one of claims 1 to 8, wherein the oil transfer chamber (52) of the oil distribution system (50) extends over an angular sector that is strictly less than 360°.
  10. An assembly according to any one of claims 1 to 9, wherein the transmission member is a speed reducing gearbox (3) of the epicyclic gear train type, wherein said rotary portion of the transmission member is a planet carrier (35), and wherein said planet carrier (35) possesses a plurality of spindles (34) each carrying a planet gear (33), each spindle (34) being provided with an oil reception chamber (37) configured to lubricate the bearing (36) of said planet carrier, and each oil reception chamber (37) being in fluid flow connection with the oil transfer chamber (52) of the oil distribution system (50) via a respective link duct (70).
  11. A gearbox assembly comprising a rotary assembly (3, 50) according to any preceding claim, the oil distribution system (50) of the assembly being received in a casing (40) having an oil feed chamber (41);
    wherein the casing (40) includes an annular oil outlet cavity (43) open over 360° towards the oil distribution system (50) and in fluid flow connection with the oil feed chamber (41); and
    wherein the oil distribution system (50) comprises an annular oil inlet cavity (53) open over 360° facing the oil outlet cavity (43) of the casing (40) and in fluid flow connection with the annular oil outlet cavity (43), and via said at least one feed orifice (54) with the oil transfer chamber (52).
  12. A turbine engine including a rotary assembly according to any one of claims 1 to 10 or a gearbox assembly according to claim 11.
EP14777703.1A 2013-09-06 2014-09-04 Rotating assembly comprising a transmission member and an oil distribution system Active EP3042105B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1358581A FR3010449B1 (en) 2013-09-06 2013-09-06 ROTARY ASSEMBLY COMPRISING A TRANSMISSION MEMBER AND AN OIL DISTRIBUTION SYSTEM
PCT/FR2014/052183 WO2015033066A1 (en) 2013-09-06 2014-09-04 Rotating assembly comprising a transmission member and an oil distribution system

Publications (2)

Publication Number Publication Date
EP3042105A1 EP3042105A1 (en) 2016-07-13
EP3042105B1 true EP3042105B1 (en) 2017-12-20

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Country Status (8)

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US (1) US9803743B2 (en)
EP (1) EP3042105B1 (en)
CN (1) CN105518347B (en)
BR (1) BR112016004918B1 (en)
CA (1) CA2922034C (en)
FR (1) FR3010449B1 (en)
RU (1) RU2664086C2 (en)
WO (1) WO2015033066A1 (en)

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EP4043756A1 (en) * 2021-02-16 2022-08-17 Flender GmbH Planet carrier arrangement, planetary gear, drive train, wind power system and computer program product
EP4043754A1 (en) * 2021-02-15 2022-08-17 Flender GmbH Planet carrier arrangement, planetary gear, drive train, wind power system and computer program product
EP4056876A1 (en) * 2021-03-09 2022-09-14 Flender GmbH Transmission device with a floating bushing for supply between components of a planetary gear

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EP4043754A1 (en) * 2021-02-15 2022-08-17 Flender GmbH Planet carrier arrangement, planetary gear, drive train, wind power system and computer program product
WO2022171482A1 (en) * 2021-02-15 2022-08-18 Flender Gmbh Planet carrier arrangement, planetary gear, drive train, wind turbine and computer program product
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EP4056876A1 (en) * 2021-03-09 2022-09-14 Flender GmbH Transmission device with a floating bushing for supply between components of a planetary gear
WO2022189398A1 (en) * 2021-03-09 2022-09-15 Flender Gmbh Transmission device with a floating bushing for supply media between components of a planetary transmission

Also Published As

Publication number Publication date
US20160215871A1 (en) 2016-07-28
US9803743B2 (en) 2017-10-31
BR112016004918A2 (en) 2017-08-01
WO2015033066A1 (en) 2015-03-12
FR3010449A1 (en) 2015-03-13
FR3010449B1 (en) 2015-09-25
EP3042105A1 (en) 2016-07-13
RU2664086C2 (en) 2018-08-15
RU2016112949A (en) 2017-10-09
CA2922034A1 (en) 2015-03-12
BR112016004918B1 (en) 2022-01-11
CA2922034C (en) 2021-06-29
CN105518347A (en) 2016-04-20
CN105518347B (en) 2019-04-05

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